Doors for a chute of a dumb-waiter, elevator, or the like.



E. W. DUGDALE.

DOOR FOR A CHUTE 0F A DUMB WAITER, ELBVATOR, 0R THE LIKE. APPLIGATION FILED MAR.24, 1914.

Patented Mar. 30, 1915.

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EDWARD W. DU'GDALE, 0F KEARNEY, NEW JERSEY.

DOORS FOR A CHUTE 0F A D'UMIB-WAITER, ELEVATOR, OR THE LKE.

Specification of Letters Patent.

Patented Mai. so, reis.

Application filed March 24, 1914. I Serial No. 826,878.

My invention consists of a dumb waiter,.

elevator or the like provided with doors leading to the shaft or chute of the same, said doors being adapted'to be operated by each other; so as to be opened and closed simultaneously, and mounted in novel frames formed of members preferably of` metal, the device in its entirety being ready to be set up at the place of the chute which said doors are to occupy, and other details areprovided, the construction and operation of which beinghereinafter set forth.

The invention is satisfactorily illustrated Vin the .accompanying drawing, but the important instrunientalities thereof 'may be varied, and so it is to be understood that the invention I.is not limited to the specific details shown and described.

Figure 1 represents a front elevation of the portion of a dumbV waiter embodying my invention. y Fig. 2 represents arear l`view thereof partly sectional. Fig. 3 represents a vertical section on line :rf-de Fig. 1. Fig. 4 represents a horizontal section on line y-y vvFig. 1. Figs. 5 and .6 represent partialverticalsections and elevations of detached portions. W

Similar numerals of reference indicate corresponding parts in the'figures. v .,Referring to the drawings, 1 designates an exterior frame lwhich isseated in a wall cfa basement or apartment, and 2 designat/es an interior frame'therein. The. frame 131g tively 1 consistsof the angular side stiles of pieces 3, the lintel 4,'and the sill 5, said members being `iirl'nly connected with each other.

The rame-2consists-of the channeled side Stiles 6, the upper cross bar 7, the shelf 8,

.said silland cross bar being firmly connected withJsaid side stiles 6 and the latter befirmly .connected attheir ends respec- `sageof Acertain .members as will be hereinafter specified. The `side stiles' 6 form verwith said lintel 4 and the sill 5 of the tically-extending channel-shaped guides for the doors 11 and 12 which are placed below the other and havey their sides -fre'ely fitted in the reveals of the side stiles Gof .1-

the inner frame so that said doors are adapted to rise and fall as sashes whereby they maybe brought together to close the inlet and outlet space or shaft of the dumb waiter and separated to open the same.

' Attached to the lower end of the upper door 11 are' the chains 13 which pass therel from as sash cords through openings 13x in the side Stiles of the inner frame and over pulleys 14, the latter being connected with said side stiles and occupying the runways 10 a portion of said chains also enterinY said runways and being connected with the ears 15 which project from the upper ends Aof the lower door 12 through the openings 15x in the sidestiles 3 into said runways 10 and are movable in the latter with said cha/ins. ln order to attach said chains to the lowerends of the upper door, l employ the hooks lsecured to the upper door and .engaging the lower links o-sa'id chains and adjacent portions of said door, and in order to permit' the play of said portions of the chains within said side Stiles said door has projecting laterally therefrom Athe bars 17 which freely occupy the spaces between the -sides of the door andthe `sides of the stiles 6 of the interior frame, said spaces forming runways 18 for said portions-'ofthe chains, said bars also serving to guide the'upper door in said "Stiles and preventing lateral motions and rattling of said door.

ln order to connect the chains 13 with the ears 15, the lower ends of the former are attached to the eye bolts o'r screw rods 19, the latter being adjustably fitted in said ears and retained 1n position by the nuts 20, on opposite sides of said ears, as most plainly shownin Fig. 5.

It will be seen that when the doors are to be opened to admit access to vthe adjacent portion of the shaft ofthe dumb waiter, the upper door is raised when owing to the chains13 being connected to the same and the-lower door, the latter is-caused to descend, thus separating the doors'and consequently opening the' same. Byl'owering'the upper door, the lower door will lie-raised, thus bringing the doors together and so closing them, it being seen thatthe frame is of length vastly o of the two doors w en in closed position,

eater than the height hence there is an unoccupied space above the yupper door, and a similar space below the same. These spaces constitute pockets the upper one of which receives the upper door when opened.,` and the lower one of which receives the lower door when opened, ythe pockets thus being Within the frame and not entering the dumb-waiter shaft.

The frames, doors and other appurtenances of the device are formed lof metal which are'light, strong, durable and fireproof and the bottom of the frame will be on the floor line of a basement or apartment, so that the doors will be suliciently above said line so as to be convenient of access for operation thereof, it` being evident that either door may be operated to cause motion of the other door in order to open `or close the doors simultaneously.

The shelf 8 and upper cross bar 7 of the interior frame connected with the side stiles of the latter, as has been stated, serve also to brace said stiles and consequently the inner frame between the ends thereof.

The front of the top pocket of the frame will be properly covered by the front wall of the chute ldownto the cross bar 7, and the frontof the bottom pocket of said frame will be properly covered by the frontwall vof the chute: up to the shelf 8 vso that said openings willnot appear in front. A

. Having thus described myinvention what I yclaimes -new and desire to secure by Letf ters Patent is l. A dumb waiter having an y exterior frame composed of angular-side pieces, a cap, and a sill, verticallyA extending channely shaped guides mounted in said frame,.me'ans for connecting said guides with said frame,

slidable doors mountedin the saidguides,v

ing freely through the central Walls of saidguides, and flexible members attached tov;

said ears adapted to pass over pulleysI on said guides and to be connected with the upper door.

2. A' dumb waiter having an exterior frame composed of angular-side` pieces, a

cap, and a sill; vertically-extending channelshaped guides ymounted in said frame, means for connecting said guides Withsaid frame, slidable doors mounted in the said guides, the length of said frame and guides being greater than the combined height of the doors in closed position, forming pockets respectively at thetop and bottom of said frame to receive said doors respectively in the open position thereof, ears on the lower door extending laterally therefrom and passing freely through the central walls of said guides, exible members 'attached to said ears adapted to pass over 'pulleys on said guides and to be connected with the upper door, a crossvbar lat the base of the upper pocket, and a shelf at the top of the lower pocket, said shelf and cross bar hav- 'ing their ends connected respectively with said-channel-shaped guides and serving also to brace the latter vbetween their ends.V

EDWARD w. DUGDALE.

Witnesses JoH'N A. WIEDERSHEIM, N. BUssINGER. 

